Patents by Inventor Paul C. Welling

Paul C. Welling has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pattern selection method and apparatus
    Patent number: 6317052
    Abstract: The duration of variations in the potential applied to a single electrical contact, when compared to a reference potential, are measured and employed to command either incrementing or decrementing of an address. The addresses are associated with a table of instructions and an addressed instruction, when read, will produce a discrete warning signal. A desired one of several light flash or audible patterns may be selected by step-wise scrolling through the table in response to manually varying the contact potential.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: November 13, 2001
    Assignee: Whelen Engineering Company, Inc.
    Inventors: Paul C. Welling, James L. Stopa
  • Pattern selection method and apparatus
    Patent number: RE38795
    Abstract: The duration of variations in the potential applied to a single electrical contact, when compared to a reference potential, are measured and employed to command either incrementing or decrementing of an address. The addresses are associated with a table of instructions and an addressed instruction, when read, will produce a discrete warning signal. A desired one of several light flash or audible patterns may be selected by step-wise scrolling through the table in response to manually varying the contact potential.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: September 13, 2005
    Assignee: Whelen Engineering Company, Inc.
    Inventors: Paul C. Welling, James L. Stopa